Electric lamp



N l. .1. HAMNER 1,771,957

ELECTRIC LAMP I Filed May 22, 1 1.925

INVENTUA .MLLARU L7. HAMMER, 2y

' 4e leading-in wires 14 and 15.

Patented Ju1 f29, 1930 [TED STATES PATENT. OFFICE r MILLARD a. HAMNER,or CLEVELAND, OHIO, AS$IGNOR TO GENERAL ELECTRIC comrm, A CORPORATION orNEW YORK ELECTRIC LAMP Application filed May 221,

' April 18, 1916.

In. a gas-filled electric lamp, which is ordinarily mounted base upward,the base and continugous parts are heated considerably by convectioncurrents which rise from the filament region It has been customary insome cases to provide a disc deflector to break up such currents and toprotectthe base of the lamp firom them. My invention comprises such adeflector and an efiectivemeans of mounting it. e

My invention is illustrated in the accompanying drawings in which Fig. 1is an elevation of a gas-filledelectric incandescent lamp inwhich it isembodied; Fig; 2'is a plan'in 2 section along the line 2-2 of Fig. 1;and Fig. 3 is an enlarged plan of the deflector 0r shield. v

The lamp illustrated in Fig.1 cdmprises a bulb 10 having a comparativelyshort neck 5 11 which is provided at its upper end with a base 12.Within the bulb there'is a stem- 13 which has sealed therein theleading-in wires 1415. The customary method'of sealing in theseleading-in Wires is to extend them I so; through the stem tube, to fusethe inner end Ofthe stem tube and to compress by clamping thefused'glass around the said wires. This results in a fiat solid mass ofglass 16'atthe inner endof thestem tube. Integrally united as to thestem tube 13 is an arbor 17 usually of glass which has su ports 18sealed therein which engage the lament 19. Current is supplied to thefilament 19 through the conductors 20- -21which are connected to the Ashereinbefore stated, the lamp illustrated, is of the gas-filled type andinord'er to prevent the hot gas from rising up into the neck portion 11of the bulb 10, I provide a 4,5 shield or deflector 22 The shield or de-1925. Serial No. 32,193.

flector is preferably made of metal and, as shown in Figs. 2 and 3,comprises a pair of semi-circular stampings 23-24 recessed at 2526 so asto conveniently fit about the clamped portion 16 of the stem tube 13.The stampings 23-24 are attached to the clamped portion 16 by means ofthe pointed tabs 2728 extending from the members 23.24 and forming-anintegral part thereof. The as sembly of the stampings 23-24 may takeplace during the manufacture of the stem. This permits the tabs 2728' tobe inserted immediately after the fused portion has been clamped atwhich-time the glass is still in a semi-plastic condition.

After the stampings 23 24: have been assembled and attached to theclamped portion 16, as shown in Fig.2, they form a disc having a vent 29therein allowing a certain amount of the hot gas to pass therethrough.This is'of advantage as it prevents an overheating of the members 23 21and also allows a certain amount of the vaporized filament material todeposit on the stem and in the upper neck portion where discoloration iscomparatively harmless.

What I claim as new and desire to secure by Letters. Patent of theUnited States, is:

1. In an electric lamp, the combination of a bulb, a stem sealed to saidbulb, leadingin conductors extending through and sealed in a clampedportion of said stem and'a deflector located in a plane substantiallytransverse to'the axis of said stem and comprising aplurality of discmembers each having a portion sealed in said clamped portion of said inwire seal portion of said stem and having a space therebetween.

3. In an electric lamp, the combination of a bulb, a stem sealed to saidbulb, leading-in 5C conductors extending through and sealed in a clampedportion of said stem and a deflector comprising a pair of disc memberslocated in substantially the same plane one supported on each side ofsaid stem and hav'- 10 iniaspace therebetween.

h dwlilitlness vlilrhiereofi Ifiiavellggeunto set my on t 's-19t a 0 aymiLARDU. HAMNER.

